FZCA52 TJSJ 130718 CWFSJU Coastal Waters Forecast National Weather Service San Juan PR 318 AM AST Sat Dec 13 2025 Puerto Rico and the U.S. Virgin Islands Waters AMZ700-132015- 318 AM AST Sat Dec 13 2025 .SYNOPSIS FOR PUERTO RICO AND THE U.S. VIRGIN ISLANDS WATERS... A surface high pressure system will continue to build near the Azores through the weekend. A weak cold front and another surface high pressure system will move from the western Atlantic into the central Atlantic over the next few days. This pattern will promote moderate to locally fresh east to southeast trade winds across the local waters. Increasing winds and a long-period northerly swell will result in choppy to rough seas, mainly across the Atlantic waters and portions of the Anegada and Mona Passages. Small Craft Advisories remain in effect at least through tomorrow morning across the passages and through Sunday afternoon across the offshore Atlantic waters. $$ AMZ711-132015- Atlantic Waters of Puerto Rico and USVI from 10 NM to 19.5N- 318 AM AST Sat Dec 13 2025 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH SUNDAY AFTERNOON... .TODAY...East winds 15 to 20 knots with gusts up to 30 knots. Seas 6 to 8 feet. Wave Detail: East 6 feet at 9 seconds and north 3 feet at 13 seconds. Scattered showers this morning. Numerous showers this afternoon. .TONIGHT...East winds 15 to 20 knots with gusts up to 30 knots. Seas 7 to 8 feet. Wave Detail: East 7 feet at 9 seconds and northwest 2 feet at 11 seconds. Numerous showers. .SUNDAY...East winds 15 to 20 knots with gusts up to 25 knots. Seas 6 to 7 feet. Wave Detail: East 7 feet at 8 seconds and northwest 2 feet at 9 seconds. Scattered showers in the morning. .SUNDAY NIGHT...Southeast winds 10 to 15 knots with gusts up to 25 knots. Seas 5 to 7 feet. Wave Detail: East 6 feet at 9 seconds and northwest 2 feet at 10 seconds. Scattered showers after midnight. .MONDAY...East winds 5 to 10 knots. Seas 5 to 6 feet. Wave Detail: East 5 feet at 9 seconds and north 2 feet at 11 seconds. Scattered showers. .MONDAY NIGHT...East winds 5 to 10 knots. Seas 5 to 6 feet. Wave Detail: East 5 feet at 9 seconds and north 2 feet at 10 seconds. Scattered showers. .TUESDAY...East winds 10 to 15 knots. Seas 4 to 5 feet. Scattered showers in the morning. .TUESDAY NIGHT...East winds 10 to 15 knots. Seas 4 to 5 feet, building to 5 to 7 feet after midnight. Scattered showers. .WEDNESDAY...East winds around 15 knots. Seas 7 to 8 feet. Scattered showers in the morning. .WEDNESDAY NIGHT...East winds around 15 knots. Seas around 7 feet. Scattered showers. $$ AMZ712-132015- Coastal Waters of Northern Puerto Rico out 10 NM- 318 AM AST Sat Dec 13 2025 ...SMALL CRAFT SHOULD EXERCISE CAUTION... .TODAY...East winds 10 to 15 knots, increasing to 15 to 20 knots this afternoon. Gusts up to 30 knots. Seas 5 to 6 feet. Wave Detail: East 5 feet at 8 seconds and north 3 feet at 13 seconds. Scattered showers this morning, then numerous showers this afternoon. .TONIGHT...East winds 15 to 20 knots, diminishing to 10 to 15 knots after midnight. Gusts up to 30 knots. Seas 5 to 6 feet. Wave Detail: East 5 feet at 6 seconds and northeast 3 feet at 13 seconds. Numerous showers. .SUNDAY...East winds 10 to 15 knots with gusts up to 25 knots. Seas 5 to 6 feet. Wave Detail: East 5 feet at 7 seconds and northwest 2 feet at 10 seconds. .SUNDAY NIGHT...Southeast winds 10 to 15 knots with gusts up to 20 knots, diminishing to 5 to 10 knots after midnight. Seas 4 to 5 feet. Wave Detail: East 5 feet at 8 seconds and northwest 2 feet at 9 seconds. .MONDAY...East winds 5 to 10 knots. Seas 4 to 5 feet. Wave Detail: Northeast 4 feet at 9 seconds and north 2 feet at 11 seconds. Scattered showers in the afternoon. .MONDAY NIGHT...East winds 5 to 10 knots, diminishing to around 5 knots after midnight. Seas around 4 feet. Wave Detail: Northeast 4 feet at 9 seconds and north 2 feet at 10 seconds. Scattered showers. .TUESDAY...East winds 5 to 10 knots, increasing to 10 to 15 knots in the afternoon. Seas around 4 feet. .TUESDAY NIGHT...East winds 10 to 15 knots, diminishing to 5 to 10 knots after midnight. Seas 4 to 5 feet. Scattered showers. .WEDNESDAY...East winds 10 to 15 knots, increasing to 15 to 20 knots in the afternoon. Seas 5 to 7 feet. Scattered showers. .WEDNESDAY NIGHT...East winds 10 to 15 knots. Seas 6 to 7 feet. Scattered showers. $$ AMZ716-132015- Coastal Waters from Cabo San Juan to the waters between Anegada Island and Virgin Gorda and North 10 NM- 318 AM AST Sat Dec 13 2025 ...SMALL CRAFT SHOULD EXERCISE CAUTION... .TODAY...East winds 15 to 20 knots with gusts up to 25 knots. Seas 4 to 6 feet. Wave Detail: East 5 feet at 5 seconds and north 3 feet at 12 seconds. Scattered showers until late afternoon, then numerous showers late. .TONIGHT...East winds 15 to 20 knots with gusts up to 25 knots. Seas 4 to 6 feet. Wave Detail: East 5 feet at 6 seconds and north 3 feet at 13 seconds. Numerous showers. .SUNDAY...East winds 15 to 20 knots with gusts up to 25 knots. Seas 4 to 6 feet. Wave Detail: East 5 feet at 6 seconds and northwest 2 feet at 11 seconds. Scattered showers in the morning. .SUNDAY NIGHT...Southeast winds 10 to 15 knots with gusts up to 20 knots. Seas 3 to 5 feet. Wave Detail: Southeast 5 feet at 7 seconds and northwest 2 feet at 9 seconds. .MONDAY...East winds 5 to 10 knots. Seas 3 to 4 feet. Wave Detail: Northeast 3 feet at 8 seconds and northwest 2 feet at 11 seconds. Numerous showers, mainly in the morning. .MONDAY NIGHT...East winds 5 to 10 knots, increasing to 10 to 15 knots with gusts up to 20 knots after midnight. Seas 3 to 4 feet. Wave Detail: East 3 feet at 9 seconds and north 2 feet at 10 seconds. Numerous showers. .TUESDAY...East winds around 10 knots. Seas 3 to 4 feet. Numerous showers in the morning. .TUESDAY NIGHT...East winds 10 to 15 knots. Seas 3 to 4 feet. Scattered showers. .WEDNESDAY...East winds around 15 knots. Seas 3 to 4 feet, building to 5 to 7 feet in the afternoon. Scattered showers. .WEDNESDAY NIGHT...East winds 15 to 20 knots. Seas 5 to 7 feet. Scattered showers. $$ AMZ723-132015- Anegada Passage east of Virgin Gorda and Saint Croix south to 17N- 318 AM AST Sat Dec 13 2025 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL NOON AST TODAY... .TODAY...East winds 15 to 20 knots with gusts up to 25 knots. Seas 6 to 7 feet. Wave Detail: East 6 feet at 7 seconds and northeast 2 feet at 13 seconds. Isolated showers early this morning, then scattered showers late this morning and afternoon. .TONIGHT...East winds 15 to 20 knots with gusts up to 30 knots. Seas around 6 feet. Wave Detail: East 6 feet at 7 seconds and northeast 2 feet at 13 seconds. Scattered showers in the evening. .SUNDAY...East winds 15 to 20 knots with gusts up to 25 knots. Seas around 6 feet. Wave Detail: East 6 feet at 7 seconds and northeast 2 feet at 13 seconds. .SUNDAY NIGHT...East winds 10 to 15 knots with gusts up to 25 knots. Seas 4 to 6 feet. Wave Detail: Southeast 6 feet at 7 seconds and northeast 1 foot at 14 seconds. .MONDAY...East winds 5 to 10 knots. Seas 4 to 5 feet. Wave Detail: East 4 feet at 8 seconds and north 1 foot at 17 seconds. Scattered showers. .MONDAY NIGHT...East winds 5 to 10 knots with gusts up to 20 knots. Seas 4 to 5 feet. Wave Detail: East 4 feet at 8 seconds and north 1 foot at 15 seconds. Numerous showers. .TUESDAY...East winds 10 to 15 knots. Seas 4 to 5 feet. .TUESDAY NIGHT...East winds 10 to 15 knots. Seas 4 to 5 feet. Scattered showers. .WEDNESDAY...East winds around 15 knots. Seas 4 to 5 feet. .WEDNESDAY NIGHT...East winds 15 to 20 knots. Seas 4 to 6 feet. Scattered showers. $$ AMZ726-132015- Coastal waters east of Puerto Rico, around Vieques, and around and just north of Culebra and Saint John- 318 AM AST Sat Dec 13 2025 ...SMALL CRAFT SHOULD EXERCISE CAUTION... .TODAY...East winds 15 to 20 knots with gusts up to 25 knots. Seas 4 to 6 feet. Wave Detail: East 5 feet at 7 seconds. Scattered showers until late afternoon, then numerous showers late. .TONIGHT...East winds 15 to 20 knots with gusts up to 25 knots. Seas 4 to 6 feet. Wave Detail: East 6 feet at 7 seconds. Numerous showers. .SUNDAY...East winds 15 to 20 knots with gusts up to 25 knots. Seas 4 to 6 feet. Wave Detail: East 6 feet at 7 seconds. Scattered showers in the morning. .SUNDAY NIGHT...East winds 10 to 15 knots with gusts up to 25 knots. Seas 3 to 5 feet. Wave Detail: Southeast 5 feet at 7 seconds. Scattered showers in the evening. .MONDAY...East winds 5 to 10 knots. Seas 3 to 4 feet. Wave Detail: East 4 feet at 8 seconds. Numerous showers, mainly in the morning. .MONDAY NIGHT...East winds 5 to 10 knots, increasing to 10 to 15 knots after midnight. Seas 3 to 4 feet. Wave Detail: East 4 feet at 9 seconds. Numerous showers. .TUESDAY...East winds 5 to 10 knots, increasing to 10 to 15 knots in the afternoon. Seas 3 to 4 feet. Numerous showers in the morning. .TUESDAY NIGHT...East winds 10 to 15 knots. Seas 3 to 4 feet. Scattered showers. .WEDNESDAY...East winds around 15 knots. Seas 3 to 5 feet. Scattered showers. .WEDNESDAY NIGHT...East winds 15 to 20 knots. Seas 4 to 6 feet. Scattered showers. $$ AMZ733-132015- Caribbean waters of Puerto Rico from 10 NM to 17N, including the coastal waters of Saint Croix- 318 AM AST Sat Dec 13 2025 ...SMALL CRAFT SHOULD EXERCISE CAUTION... .TODAY...East winds 15 to 20 knots with gusts up to 30 knots. Seas 5 to 6 feet. Wave Detail: East 6 feet at 7 seconds. Scattered showers early this morning, then isolated showers late this morning. Scattered showers this afternoon. .TONIGHT...East winds 15 to 20 knots with gusts up to 30 knots. Seas 5 to 6 feet. Wave Detail: East 6 feet at 7 seconds. Scattered showers. .SUNDAY...East winds 15 to 20 knots with gusts up to 30 knots. Seas 5 to 6 feet. Wave Detail: East 6 feet at 7 seconds. .SUNDAY NIGHT...East winds 10 to 15 knots with gusts up to 25 knots. Seas around 5 feet. Wave Detail: East 5 feet at 7 seconds. Scattered showers in the evening. .MONDAY...East winds 5 to 10 knots. Seas 4 to 5 feet. Wave Detail: East 5 feet at 8 seconds. Scattered showers in the afternoon. .MONDAY NIGHT...East winds 5 to 10 knots. Seas 3 to 4 feet. Wave Detail: East 4 feet at 8 seconds. Scattered showers. .TUESDAY...East winds 5 to 10 knots, increasing to 10 to 15 knots in the afternoon. Seas 3 to 4 feet. Scattered showers in the morning. .TUESDAY NIGHT...East winds 10 to 15 knots. Seas 3 to 4 feet. Scattered showers. .WEDNESDAY...East winds around 15 knots. Seas 4 to 5 feet. Scattered showers in the morning. .WEDNESDAY NIGHT...East winds 15 to 20 knots. Seas 4 to 5 feet. $$ AMZ735-132015- Coastal Waters of Southern Puerto Rico out 10 NM- 318 AM AST Sat Dec 13 2025 ...SMALL CRAFT SHOULD EXERCISE CAUTION... .TODAY...East winds 10 to 15 knots, increasing to 15 to 20 knots late this morning and afternoon. Seas 4 to 5 feet. Wave Detail: East 5 feet at 7 seconds. Scattered showers early this morning, then isolated showers late this morning. Scattered showers this afternoon. .TONIGHT...East winds 15 to 20 knots with gusts up to 25 knots. Seas 3 to 5 feet. Wave Detail: East 5 feet at 7 seconds. Scattered showers in the evening. .SUNDAY...East winds 15 to 20 knots, diminishing to 10 to 15 knots in the afternoon. Seas 4 to 5 feet. Wave Detail: East 5 feet at 7 seconds. .SUNDAY NIGHT...East winds 10 to 15 knots, diminishing to 5 to 10 knots after midnight. Seas 3 to 5 feet. Wave Detail: East 5 feet at 7 seconds. .MONDAY...East winds 5 to 10 knots. Seas 3 to 4 feet. Wave Detail: Southeast 4 feet at 7 seconds. .MONDAY NIGHT...East winds 5 to 10 knots. Seas 2 to 4 feet. Wave Detail: Southeast 3 feet at 7 seconds. Scattered showers. .TUESDAY...East winds 5 to 10 knots. Seas 2 to 3 feet. .TUESDAY NIGHT...East winds 10 to 15 knots. Seas 2 to 3 feet. .WEDNESDAY...East winds 10 to 15 knots. Seas 2 to 4 feet. Scattered showers. .WEDNESDAY NIGHT...East winds 10 to 15 knots. Seas 3 to 4 feet. $$ AMZ741-132015- Mona Passage Southward to 17N- 318 AM AST Sat Dec 13 2025 ...SMALL CRAFT SHOULD EXERCISE CAUTION... .TODAY...East winds 10 to 15 knots, increasing to 15 to 20 knots late this morning and afternoon. Gusts up to 30 knots. Seas 5 to 6 feet. Wave Detail: East 6 feet at 7 seconds and north 1 foot at 10 seconds. Numerous showers early this morning. Scattered showers late this morning. Isolated showers late. .TONIGHT...East winds 15 to 20 knots with gusts up to 30 knots. Seas 5 to 6 feet. Wave Detail: East 6 feet at 7 seconds and northeast 3 feet at 13 seconds. Scattered showers. .SUNDAY...East winds 15 to 20 knots with gusts up to 30 knots. Seas 5 to 6 feet. Wave Detail: East 6 feet at 7 seconds and northeast 2 feet at 13 seconds. .SUNDAY NIGHT...East winds 10 to 15 knots with gusts up to 20 knots. Seas 4 to 6 feet. Wave Detail: East 5 feet at 7 seconds and north 1 foot at 9 seconds. Numerous showers, mainly in the evening. .MONDAY...East winds 10 to 15 knots with gusts up to 20 knots, diminishing to 5 to 10 knots in the afternoon. Seas 4 to 5 feet. Wave Detail: East 5 feet at 8 seconds and north 1 foot at 10 seconds. .MONDAY NIGHT...East winds 5 to 10 knots. Seas 3 to 4 feet. Wave Detail: East 4 feet at 7 seconds and north 1 foot at 10 seconds. Scattered showers. .TUESDAY...East winds 5 to 10 knots. Seas 3 to 4 feet. .TUESDAY NIGHT...East winds 10 to 15 knots. Seas 3 to 4 feet. Scattered showers. .WEDNESDAY...East winds 10 to 15 knots, increasing to 15 to 20 knots in the afternoon. Seas 4 to 6 feet. .WEDNESDAY NIGHT...East winds 15 to 20 knots. Seas 5 to 7 feet. $$ AMZ742-132015- Coastal Waters of Northwestern Puerto Rico out 10 NM- 318 AM AST Sat Dec 13 2025 .TODAY...East winds 10 to 15 knots, diminishing to 5 to 10 knots early this afternoon, then increasing to 10 to 15 knots late. Gusts up to 25 knots. Seas 3 to 5 feet. Wave Detail: Northeast 3 feet at 6 seconds. Scattered showers this afternoon. .TONIGHT...East winds 15 to 20 knots, diminishing to 10 to 15 knots after midnight. Gusts up to 30 knots. Seas 3 to 5 feet. Wave Detail: Northeast 4 feet at 5 seconds and north 3 feet at 13 seconds. Scattered showers in the evening. .SUNDAY...East winds 5 to 10 knots with gusts up to 20 knots. Seas 3 to 5 feet. Wave Detail: Northeast 3 feet at 7 seconds and north 2 feet at 10 seconds. Scattered showers in the afternoon. .SUNDAY NIGHT...East winds 5 to 10 knots. Seas 2 to 4 feet. Wave Detail: East 3 feet at 6 seconds and northwest 2 feet at 9 seconds. .MONDAY...Northeast winds around 5 knots. Seas 2 to 4 feet. Wave Detail: East 3 feet at 7 seconds and north 2 feet at 11 seconds. .MONDAY NIGHT...Northeast winds 5 to 10 knots. Seas 2 to 3 feet. Wave Detail: East 2 feet at 8 seconds and north 2 feet at 10 seconds. .TUESDAY...East winds 5 to 10 knots. Seas 2 to 3 feet. Scattered showers in the afternoon. .TUESDAY NIGHT...East winds 5 to 10 knots. Seas 2 to 3 feet. .WEDNESDAY...East winds 5 to 10 knots, increasing to 10 to 15 knots in the afternoon. Seas 3 to 5 feet, building to 5 to 7 feet in the afternoon. Scattered showers in the afternoon. .WEDNESDAY NIGHT...East winds 10 to 15 knots. Seas 5 to 7 feet. Scattered showers. $$ AMZ745-132015- Coastal Waters of Southwestern Puerto Rico out 10 NM- 318 AM AST Sat Dec 13 2025 ...SMALL CRAFT SHOULD EXERCISE CAUTION... .TODAY...East winds 5 to 10 knots, increasing to 15 to 20 knots with gusts up to 25 knots this afternoon. Seas 2 to 4 feet. Wave Detail: Southeast 3 feet at 6 seconds and northwest 2 feet at 10 seconds. Isolated showers this afternoon. .TONIGHT...East winds 10 to 15 knots with gusts up to 25 knots. Seas 2 to 4 feet. Wave Detail: East 3 feet at 6 seconds and northwest 2 feet at 10 seconds. .SUNDAY...East winds 15 to 20 knots with gusts up to 25 knots. Seas 2 to 4 feet. Wave Detail: Southeast 3 feet at 6 seconds and northwest 2 feet at 10 seconds. .SUNDAY NIGHT...East winds 10 to 15 knots with gusts up to 20 knots, diminishing to 5 to 10 knots after midnight. Seas 2 to 4 feet. Wave Detail: East 3 feet at 6 seconds and northwest 2 feet at 9 seconds. .MONDAY...Southeast winds around 5 knots. Seas 2 to 3 feet. Wave Detail: Southeast 2 feet at 7 seconds and northwest 1 foot at 10 seconds. .MONDAY NIGHT...East winds 5 to 10 knots. Seas 2 to 3 feet. Wave Detail: South 2 feet at 7 seconds and northwest 1 foot at 11 seconds. .TUESDAY...East winds around 5 knots. Seas around 2 feet. Scattered showers in the afternoon. .TUESDAY NIGHT...East winds around 5 knots. Seas around 2 feet. .WEDNESDAY...East winds 5 to 10 knots. Seas 2 to 4 feet. Scattered showers in the afternoon. .WEDNESDAY NIGHT...East winds 5 to 10 knots. Seas 3 to 5 feet. Scattered showers. $$